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2 years ago

Can u help solve this

Mathematics

1 answer:

Klio2033 [76]2 years ago

4 0

Answer:

3 or 6/2

Step-by-step explanation:

4--2 (you add there is a subtraction of a negative) over or divided by 3-1

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An SRS of 450 450 high school seniors gained an average of ¯ x = 20 x¯=20 points in their second attempt at the SAT Mathematics

maria [59]

Answer: (15.47, 24.53)

Step-by-step explanation:

We know that the confidence interval for population mean is given by :_

$\overline{x}\pm z^*\dfrac{\sigma}{\sqrt{n}}$

, where n= sample size.

$\sigma$ = standard deviation.

$\overline{x}$ = sample mean.

z*= Critical value.

Given : n= 450

$\overline{x}=20$

$\sigma=49$

Critical value for 95% confidence = z*=1.96 [From z-value table]

Then, the 95% confidence interval will be :-

$20\pm (1.96)\dfrac{49}{\sqrt{450}}$

$\approx 20\pm (1.96)(2.31)$

$\approx 20\pm 4.53$

$=(20-4.53,\ 20+4.53)=(15.47,\ 24.53)$

Hence, the 95% confidence interval for the mean change in score μ μ in the population of all high school seniors. : (15.47, 24.53)

3 0

2 years ago

Can someone solve this? Number 25 only please.

V125BC [204]

0.06x0.06 = 0.0036

dont wory about the zeros just the actual numbers than add the zeros

6 0

2 years ago

Which type of parent function is f(x) =^3cubed x

sergij07 [2.7K]

Answer:

Cube Root

Step-by-step explanation:

Because there is a 3 outside the symbol.

That means the equation is stating: y * y * y = x

Hope this helps :)

7 0

2 years ago

1/2e=1/4 what does equation equal

expeople1 [14]

$\sf \frac{1}{2e}= \frac{1}{4} \\ \\ 2e=4 \\ \\ \boxed{\sf e=2}$

3 0

2 years ago

What is the range in 5.7.12.14.16,16

igor_vitrenko [27]

The range is the highest number minus the lowest number. So in this case it would be:

16 - 5 = 11

Hope this helps! :)

5 0

2 years ago

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